[INFO] fetching crate rustun 0.4.0...
[INFO] checking rustun-0.4.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate rustun 0.4.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate rustun 0.4.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rustun 0.4.0
[INFO] finished tweaking crates.io crate rustun 0.4.0
[INFO] tweaked toml for crates.io crate rustun 0.4.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate rustun 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded trackable v0.2.24
[INFO] [stderr]   Downloaded getrandom v0.2.5
[INFO] [stderr]   Downloaded stun_codec v0.2.0
[INFO] [stderr]   Downloaded bytecodec v0.4.15
[INFO] [stderr]   Downloaded fibers_global v0.1.2
[INFO] [stderr]   Downloaded fibers_timeout_queue v0.1.0
[INFO] [stderr]   Downloaded factory v0.1.2
[INFO] [stderr]   Downloaded nbchan v0.1.3
[INFO] [stderr]   Downloaded splay_tree v0.2.10
[INFO] [stderr]   Downloaded fibers v0.1.13
[INFO] [stderr]   Downloaded fibers_transport v0.1.3
[INFO] [stderr]   Downloaded sha1 v0.2.0
[INFO] [stderr]   Downloaded hmac-sha1 v0.1.3
[INFO] [stderr]   Downloaded libc v0.2.120
[INFO] [stderr]   Downloaded trackable_derive v1.0.0
[INFO] [stderr]   Downloaded trackable v1.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 12cf4ffc8ac05f81638b283d545b7beff341fd9c5b547c140bb8076e6e0804e0
[INFO] running `Command { std: "docker" "start" "-a" "12cf4ffc8ac05f81638b283d545b7beff341fd9c5b547c140bb8076e6e0804e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "12cf4ffc8ac05f81638b283d545b7beff341fd9c5b547c140bb8076e6e0804e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12cf4ffc8ac05f81638b283d545b7beff341fd9c5b547c140bb8076e6e0804e0", kill_on_drop: false }`
[INFO] [stdout] 12cf4ffc8ac05f81638b283d545b7beff341fd9c5b547c140bb8076e6e0804e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b789e7473a00f8e327e2f99b5722bdc0277c5efaf6f8ff0feab9e6de8adb4a7c
[INFO] running `Command { std: "docker" "start" "-a" "b789e7473a00f8e327e2f99b5722bdc0277c5efaf6f8ff0feab9e6de8adb4a7c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.120
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]     Checking nbchan v0.1.3
[INFO] [stderr]     Checking splay_tree v0.2.10
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking sha1 v0.2.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking crc-catalog v1.1.1
[INFO] [stderr]     Checking hmac-sha1 v0.1.3
[INFO] [stderr]     Checking crc v2.1.0
[INFO] [stderr]     Checking md5 v0.7.0
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking factory v0.1.2
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking getrandom v0.2.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking fibers v0.1.13
[INFO] [stderr]     Checking fibers_timeout_queue v0.1.0
[INFO] [stderr]     Checking fibers_global v0.1.2
[INFO] [stderr]    Compiling trackable_derive v1.0.0
[INFO] [stderr]    Compiling clap_derive v3.1.4
[INFO] [stderr]     Checking trackable v1.2.0
[INFO] [stderr]     Checking trackable v0.2.24
[INFO] [stderr]     Checking bytecodec v0.4.15
[INFO] [stderr]     Checking clap v3.1.6
[INFO] [stderr]     Checking stun_codec v0.2.0
[INFO] [stderr]     Checking fibers_transport v0.1.3
[INFO] [stderr]     Checking rustun v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `fibers_transport` is imported redundantly
[INFO] [stdout]   --> src/server.rs:18:24
[INFO] [stdout]    |
[INFO] [stdout] 18 | use fibers_transport::{self, FixedPeerTransporter, TcpTransport, UdpTransport};
[INFO] [stdout]    |                        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:79:1
[INFO] [stdout]    |
[INFO] [stdout] 79 | extern crate fibers_transport;
[INFO] [stdout]    | ------------------------------ the item `fibers_transport` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fibers_transport` is imported redundantly
[INFO] [stdout]   --> src/server.rs:18:24
[INFO] [stdout]    |
[INFO] [stdout] 18 | use fibers_transport::{self, FixedPeerTransporter, TcpTransport, UdpTransport};
[INFO] [stdout]    |                        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:79:1
[INFO] [stdout]    |
[INFO] [stdout] 79 | extern crate fibers_transport;
[INFO] [stdout]    | ------------------------------ the item `fibers_transport` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fibers_global` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:108:9
[INFO] [stdout]     |
[INFO] [stdout] 77  | extern crate fibers_global;
[INFO] [stdout]     | --------------------------- the item `fibers_global` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 108 |     use fibers_global;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.92s
[INFO] running `Command { std: "docker" "inspect" "b789e7473a00f8e327e2f99b5722bdc0277c5efaf6f8ff0feab9e6de8adb4a7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b789e7473a00f8e327e2f99b5722bdc0277c5efaf6f8ff0feab9e6de8adb4a7c", kill_on_drop: false }`
[INFO] [stdout] b789e7473a00f8e327e2f99b5722bdc0277c5efaf6f8ff0feab9e6de8adb4a7c
[INFO] checking rustun-0.4.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate rustun 0.4.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate rustun 0.4.0 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rustun 0.4.0
[INFO] finished tweaking crates.io crate rustun 0.4.0
[INFO] tweaked toml for crates.io crate rustun 0.4.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate rustun 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6952aea695e894ce36e98cb788d295ec22572eeab970faeb691d99d60bd8119d
[INFO] running `Command { std: "docker" "start" "-a" "6952aea695e894ce36e98cb788d295ec22572eeab970faeb691d99d60bd8119d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6952aea695e894ce36e98cb788d295ec22572eeab970faeb691d99d60bd8119d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6952aea695e894ce36e98cb788d295ec22572eeab970faeb691d99d60bd8119d", kill_on_drop: false }`
[INFO] [stdout] 6952aea695e894ce36e98cb788d295ec22572eeab970faeb691d99d60bd8119d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eb1dca516188249809782ec7f5145e15ab519bc02e7a6e37624e946722f0e5f1
[INFO] running `Command { std: "docker" "start" "-a" "eb1dca516188249809782ec7f5145e15ab519bc02e7a6e37624e946722f0e5f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.120
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]     Checking nbchan v0.1.3
[INFO] [stderr]     Checking splay_tree v0.2.10
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking crc-catalog v1.1.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking sha1 v0.2.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking crc v2.1.0
[INFO] [stderr]     Checking hmac-sha1 v0.1.3
[INFO] [stderr]     Checking md5 v0.7.0
[INFO] [stderr]     Checking factory v0.1.2
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking getrandom v0.2.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking fibers v0.1.13
[INFO] [stderr]     Checking fibers_timeout_queue v0.1.0
[INFO] [stderr]     Checking fibers_global v0.1.2
[INFO] [stderr]    Compiling trackable_derive v1.0.0
[INFO] [stderr]    Compiling clap_derive v3.1.4
[INFO] [stderr]     Checking trackable v1.2.0
[INFO] [stderr]     Checking trackable v0.2.24
[INFO] [stderr]     Checking bytecodec v0.4.15
[INFO] [stderr]     Checking clap v3.1.6
[INFO] [stderr]     Checking stun_codec v0.2.0
[INFO] [stderr]     Checking fibers_transport v0.1.3
[INFO] [stderr]     Checking rustun v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `fibers_transport` is imported redundantly
[INFO] [stdout]   --> src/server.rs:18:24
[INFO] [stdout]    |
[INFO] [stdout] 18 | use fibers_transport::{self, FixedPeerTransporter, TcpTransport, UdpTransport};
[INFO] [stdout]    |                        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:79:1
[INFO] [stdout]    |
[INFO] [stdout] 79 | extern crate fibers_transport;
[INFO] [stdout]    | ------------------------------ the item `fibers_transport` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fibers_transport` is imported redundantly
[INFO] [stdout]   --> src/server.rs:18:24
[INFO] [stdout]    |
[INFO] [stdout] 18 | use fibers_transport::{self, FixedPeerTransporter, TcpTransport, UdpTransport};
[INFO] [stdout]    |                        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:79:1
[INFO] [stdout]    |
[INFO] [stdout] 79 | extern crate fibers_transport;
[INFO] [stdout]    | ------------------------------ the item `fibers_transport` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fibers_global` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:108:9
[INFO] [stdout]     |
[INFO] [stdout] 77  | extern crate fibers_global;
[INFO] [stdout]     | --------------------------- the item `fibers_global` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 108 |     use fibers_global;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.24s
[INFO] running `Command { std: "docker" "inspect" "eb1dca516188249809782ec7f5145e15ab519bc02e7a6e37624e946722f0e5f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb1dca516188249809782ec7f5145e15ab519bc02e7a6e37624e946722f0e5f1", kill_on_drop: false }`
[INFO] [stdout] eb1dca516188249809782ec7f5145e15ab519bc02e7a6e37624e946722f0e5f1